temp guage failure

[bmwdready347]

i just completed an e30 s50 turbo swap.at first couldnt get guage to work.but thanks to r3v, i was told to put brown top sensor in it and it worked...this week i was instaling my boost guage and a wire touched,not for long for 2 sec. or so.after that my temp guage sky rocketed..straight to red..even when i turn key off it stays there...i checked fuses and it was not blown which is fuse 10..the cluster fuse.i remove the sensor and bought a new one and same thing..only when i remove clip from sensor it drops and go to cold ...once pluged back it gos into red..i gounded wire in clip to to see if neddle jumps to see if im getting connectin which i am..cannot figure this out...can some one help me thanks..

[bmwdready347]

no one......... i want to drive my car to the tuner but do not want to fry or blow headgsget..so please comment if u can

[M3PO]

If the sensor is new, I would assume that it's either an issue with melted/shorted wiring somewhere or somehow the gauge in the cluster got ruined. If it were me, my next step would be to pull a used gauge from the pick-ur-part and put that into the cluster. If that doesn't work, you most likely melted wiring somewhere.

[bmwdready347]

Will try that.. Working on a cluster..I'm just getting tired now very time I fix some thing something else gos wrong..smh

[BergerNJ]

crossing wires for any amount of time will allow a short to occur. Sounds like a short....Since the gauge is pinned even when the car is off, it sounds like the gauge is the problem.

If it was a sensor or wiring issue, with the gauge only reading a bad signal and pinning itself in the red when turned on, then it would return back to normal when the car is off.....

I would trace the wires for the sensor and gauge just in case though.

[bmwdready347]

thanks guys any one have a cluster for sale

[nando]

I *think* if the gauge is pegged to the right (full hot) all the time that means that there is a short somewhere (NTC sensor = lower resistance at higher temps, so a short would make it shoot straight to full hot). that it goes to full cold when you disconnect (infinite resistance) gives me a hunch you've got a short somewhere.


check for continuity between the sensor plug and the corresponding pin in the C101, and to ground. also make sure you actually wired the C101 to the right pins.

[328ijunkie]

^ if the gauge is responding it most likely works. You have issues elsewhere im betting.

[bmwdready347]

Like were ..what else can i do or check

[M3PO]

As nando already said, check the wiring. You most likely have a short.

[bmwdready347]

Just also noticed the cluster also rpm will no rev pass 2000 rpm ..